<template>
  <div>
    <el-form :rules="rules"
             v-loading="loading"
             element-loading-text="正在登录..."
             element-loading-spinner="el-icon-loading"
             element-loading-background="rgba(0, 0, 0, 0.8)"
             ref="loginForm"
             :model="loginForm"
             class="LoginContainer">
      <h3 class="LoginTitle">系统登录</h3>
      <el-form-item prop="username">
        <el-input type="text" auto-complete="false" v-model="loginForm.username" placeholder="请输入用户名"></el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input type="password" auto-complete="false" v-model="loginForm.password" placeholder="请输入密码"></el-input>
      </el-form-item>
      <el-form-item prop="code">
        <el-input type="text" auto-complete="false" v-model="loginForm.code" placeholder="点击图片更换验证码" style="width: 250px;margin-right: 5px"> </el-input>
        <img :src="captureUrl" @click="updateCapture">
      </el-form-item>
      <el-checkbox v-model="checked" class="LoginRememberMe">记住我</el-checkbox>
      <el-button type="primary" style="width: 100%" @click="submitLogin" @keydown.enter.native="submitLogin">登录</el-button>
    </el-form>
  </div>
</template>

<script>

export default {
  name: "Login",
  data(){
    return{
      captureUrl:'/kaptcha?time='+new Date(),
      loginForm:{
        username:'admin',
        password:'123',
        code:''
      },
      loading:false,
      checked:true,
      rules:{
        username: [{required: true, message: '请输入用户名', trigger: 'blur'}],
        password: [{required: true, message: '请输入密码', trigger: 'blur'}],
        code:[{required: true, message: '请输入验证码', trigger: 'blur'}]
      }
    }
  },
  methods: {
    updateCapture(){
      this.captureUrl = '/kaptcha?time='+new Date();
    },
    submitLogin() {
      this.$refs.loginForm.validate((valid) =>{
        if (valid) {
          this.loading = true;
          this.postRequest('/login',this.loginForm).then(resp =>{
            if (resp){
              this.loading = false;
              //存储用户token
              const tokenStr = resp.data.tokenHead+resp.data.token;
              window.sessionStorage.setItem('tokenStr',tokenStr);
              //跳转首页
              let path = this.$route.query.redirect;
              this.$router.replace((path =='/' || path==undefined)? '/home': path);
            }
          })
        } else {
          this.$message.error('登录失败，输入信息有误');
          return false;
        }
      });
    }
  }
}
</script>

<style>
  .LoginContainer{
    border-radius: 15px;
    background-clip: padding-box;
    margin: 180px auto;
    width: 350px;
    padding: 15px 35px 15px 35px;
    background: #fff;
    border: 1px solid #eaeaea;
    box-shadow: 0 0 26px #cac6c6;
  }
  .LoginTitle{
    text-align: center;
    margin: 0px auto 20px auto;
  }
  .LoginRememberMe{
    text-align: left;
    margin: 0px 0px 15px 0px;
  }
  .el-form-item__content{
    display: flex;
    align-items: center;
  }
</style>
